Ridiculous though it sounds, let us for the samke of an argument accept that Kanhai (sorry, can't you Ken, dude) was ignorant about what his lawyer applied for on his behalf, why can't he bring his son back to India and get him a good education. There are countless good institutes in India and I am sure this guy has made a decent money during his stay.
After his education, the son can always go back to the US, since he is an American by birth. Why his this couple making a desparate attempt to go back?